https://sourceware.org/bugzilla/show_bug.cgi?id=28172
Bug ID: 28172
Summary: heap-buffer-overflow on `nm-new -a -l`
Product: binutils
Version: 2.38 (HEAD)
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: shaohua.li at inf dot ethz.ch
Target Milestone: ---
Created attachment 13582
--> https://sourceware.org/bugzilla/attachment.cgi?id=13582&action=edit
poc
Hi there,
I found a heap-buffer-overflow on `nm-new -a -l` with a fuzzer.
- binutils version: 2.38(Head), commit af51804103a08cd1e12edc4f4a30eec2c5c4f9e8
- Compiler: clang12
- Platform: Ubuntu 18.04.5 LTS, x86_64
- Reproduce: run `nm-new -a -l poc`
AddressSanitizer report:
==526==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6070000002bf
at pc 0x0000005030c1 bp 0x7ffd40963900 sp 0x7ffd409638f8
READ of size 1 at 0x6070000002bf thread T0
#0 0x5030c0 in bfd_getl16 /binutils_latest/repo/bfd/libbfd.c:633:11
#1 0xe918e9 in bfin_pcrel24_reloc
/binutils_latest/repo/bfd/elf32-bfin.c:133:9
#2 0x154b6b7 in bfd_perform_relocation
/binutils_latest/repo/bfd/reloc.c:711:14
#3 0x154f66f in bfd_generic_get_relocated_section_contents
/binutils_latest/repo/bfd/reloc.c:8463:10
#4 0x4eaa6f in bfd_get_relocated_section_contents
/binutils_latest/repo/bfd/bfd.c:2166:10
#5 0x1551708 in bfd_simple_get_relocated_section_contents
/binutils_latest/repo/bfd/simple.c:298:14
#6 0x6a2d07 in _bfd_dwarf1_find_nearest_line
/binutils_latest/repo/bfd/dwarf1.c:523:4
#7 0x5cfd47 in _bfd_elf_find_nearest_line
/binutils_latest/repo/bfd/elf.c:9206:7
#8 0x4d1c99 in print_symbol /binutils_latest/repo/binutils/nm.c:1072:12
#9 0x4ceaeb in print_symbols /binutils_latest/repo/binutils/nm.c:1152:7
#10 0x4cd23c in display_rel_file /binutils_latest/repo/binutils/nm.c:1279:5
#11 0x4c97dd in display_file /binutils_latest/repo/binutils/nm.c:1446:7
#12 0x4c90db in main /binutils_latest/repo/binutils/nm.c:1965:12
#13 0x7f5a1a0a90b2 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x270b2)
#14 0x41c55d in _start (/out_bin/nm-new+0x41c55d)
0x6070000002bf is located 1 bytes to the left of 66-byte region
[0x6070000002c0,0x607000000302)
allocated by thread T0 here:
#0 0x49741d in malloc (/out_bin/nm-new+0x49741d)
#1 0x502ac2 in bfd_malloc /binutils_latest/repo/bfd/libbfd.c:289:9
#2 0x15512fe in bfd_simple_get_relocated_section_contents
/binutils_latest/repo/bfd/simple.c:265:27
#3 0x6a2d07 in _bfd_dwarf1_find_nearest_line
/binutils_latest/repo/bfd/dwarf1.c:523:4
#4 0x5cfd47 in _bfd_elf_find_nearest_line
/binutils_latest/repo/bfd/elf.c:9206:7
#5 0x4d1c99 in print_symbol /binutils_latest/repo/binutils/nm.c:1072:12
#6 0x4ceaeb in print_symbols /binutils_latest/repo/binutils/nm.c:1152:7
#7 0x4cd23c in display_rel_file /binutils_latest/repo/binutils/nm.c:1279:5
#8 0x4c97dd in display_file /binutils_latest/repo/binutils/nm.c:1446:7
#9 0x4c90db in main /binutils_latest/repo/binutils/nm.c:1965:12
#10 0x7f5a1a0a90b2 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x270b2)
SUMMARY: AddressSanitizer: heap-buffer-overflow
/binutils_latest/repo/bfd/libbfd.c:633:11 in bfd_getl16
Shadow bytes around the buggy address:
0x0c0e7fff8000: fa fa fa fa fd fd fd fd fd fd fd fd fd fd fa fa
0x0c0e7fff8010: fa fa fd fd fd fd fd fd fd fd fd fa fa fa fa fa
0x0c0e7fff8020: fd fd fd fd fd fd fd fd fd fa fa fa fa fa fd fd
0x0c0e7fff8030: fd fd fd fd fd fd fd fa fa fa fa fa fd fd fd fd
0x0c0e7fff8040: fd fd fd fd fd fa fa fa fa fa 00 00 00 00 00 00
=>0x0c0e7fff8050: 00 00 00 fa fa fa fa[fa]00 00 00 00 00 00 00 00
0x0c0e7fff8060: 02 fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0e7fff8070: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0e7fff8080: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0e7fff8090: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0e7fff80a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
Shadow gap: cc
==526==ABORTING
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